背景:本研究旨在评估按蚊幼虫栖息地的空间分布以及与之相关的环境因素,作为实施幼虫的先决条件。
方法:该研究于2021年12月进行,在短雨季结束(9月至11月)和短旱季(12月至2月)之间的过渡期。Physical,生物,和土地覆盖数据与昆虫学观察相结合,以收集三个主要城镇的按蚊幼虫:Mitzic,Oyem,还有Bitam,在从雨季到旱季的过渡期间使用“浸渍”方法。然后在为研究期间建立的野外实验室中饲养收集的幼虫。按蚊出现后,使用适当的形态分类键鉴定了它们的物种。为了确定环境因素对按蚊繁殖的影响,使用多因素分析(MFA)和二项广义线性模型。
结果:根据研究,在检查的284个幼虫栖息地中,只有33.1%的按蚊幼虫呈阳性,主要被鉴定为属于冈比亚按蚊复合体。研究结果表明,An的存在。幼虫栖息地中的冈比亚复杂幼虫与各种重要因素有关,例如城市化程度更高,幼虫栖息地(水池和水坑)的大小和类型,与库蚊和伊蚊幼虫共现,环境温度下的热点,适度降雨,和土地利用模式。
结论:这项研究的结果标志着旨在根除或减少An幼虫栖息地的重点病媒控制计划的启动。加蓬沃劳恩特姆省的冈比亚蚊子。这种方法涉及疟疾通过幼虫传播的根本原因,并且与世界卫生组织(WHO)的全球目标一致,即降低疟疾流行地区的疟疾流行率。
BACKGROUND: This study aimed to assess the spatial distribution of Anopheles mosquito larval habitats and the environmental factors associated with them, as a prerequisite for the implementation of larviciding.
METHODS: The study was conducted in December 2021, during the transition period between the end of the short rainy season (September-November) and the short dry season (December-February). Physical, biological, and land cover data were integrated with entomological observations to collect Anopheles larvae in three major towns: Mitzic, Oyem, and Bitam, using the \"dipping\" method during the transition from rainy to dry season. The collected larvae were then reared in a field laboratory established for the study period. After the Anopheles mosquitoes had emerged, their species were identified using appropriate morphological taxonomic keys. To determine the influence of environmental factors on the breeding of Anopheles mosquitoes, multiple-factor analysis (MFA) and a binomial generalized linear model were used.
RESULTS: According to the study, only 33.1% out of the 284 larval habitats examined were found to be positive for Anopheles larvae, which were primarily identified as belonging to the Anopheles gambiae complex. The findings of the research suggested that the presence of An. gambiae complex larvae in larval habitats was associated with various significant factors such as higher urbanization, the size and type of the larval habitats (pools and puddles), co-occurrence with Culex and Aedes larvae, hot spots in ambient temperature, moderate rainfall, and land use patterns.
CONCLUSIONS: The results of this research mark the initiation of a focused vector control plan that aims to eradicate or lessen the larval habitats of An. gambiae mosquitoes in
Gabon\'s Woleu Ntem province. This approach deals with the root causes of malaria transmission through larvae and is consistent with the World Health Organization\'s (WHO) worldwide objective to decrease malaria prevalence in regions where it is endemic.